/*
 * EAP peer/server: EAP-SIM/AKA/AKA' shared routines
 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"

#include "common.h"
#include "eap_common/eap_defs.h"
#include "sha1.h"
#include "sha256.h"
#include "crypto.h"
#include "aes_wrap.h"
#include "wpabuf.h"
#include "eap_common/eap_sim_common.h"


static int eap_sim_prf(const u8 *key, u8 *x, size_t xlen)
{
        return fips186_2_prf(key, EAP_SIM_MK_LEN, x, xlen);
}


void eap_sim_derive_mk(const u8 *identity, size_t identity_len,
                       const u8 *nonce_mt, u16 selected_version,
                       const u8 *ver_list, size_t ver_list_len,
                       int num_chal, const u8 *kc, u8 *mk)
{
        u8 sel_ver[2];
        const unsigned char *addr[5];
        size_t len[5];

        addr[0] = identity;
        len[0] = identity_len;
        addr[1] = kc;
        len[1] = num_chal * EAP_SIM_KC_LEN;
        addr[2] = nonce_mt;
        len[2] = EAP_SIM_NONCE_MT_LEN;
        addr[3] = ver_list;
        len[3] = ver_list_len;
        addr[4] = sel_ver;
        len[4] = 2;

        WPA_PUT_BE16(sel_ver, selected_version);

        /* MK = SHA1(Identity|n*Kc|NONCE_MT|Version List|Selected Version) */
        sha1_vector(5, addr, len, mk);
        wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: MK", mk, EAP_SIM_MK_LEN);
}


void eap_aka_derive_mk(const u8 *identity, size_t identity_len,
                       const u8 *ik, const u8 *ck, u8 *mk)
{
        const u8 *addr[3];
        size_t len[3];

        addr[0] = identity;
        len[0] = identity_len;
        addr[1] = ik;
        len[1] = EAP_AKA_IK_LEN;
        addr[2] = ck;
        len[2] = EAP_AKA_CK_LEN;

        /* MK = SHA1(Identity|IK|CK) */
        sha1_vector(3, addr, len, mk);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: IK", ik, EAP_AKA_IK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: CK", ck, EAP_AKA_CK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: MK", mk, EAP_SIM_MK_LEN);
}


int eap_sim_derive_keys(const u8 *mk, u8 *k_encr, u8 *k_aut, u8 *msk, u8 *emsk)
{
        u8 buf[EAP_SIM_K_ENCR_LEN + EAP_SIM_K_AUT_LEN +
               EAP_SIM_KEYING_DATA_LEN + EAP_EMSK_LEN], *pos;
        if (eap_sim_prf(mk, buf, sizeof(buf)) < 0) {
                wpa_printf(MSG_ERROR, "EAP-SIM: Failed to derive keys");
                return -1;
        }
        pos = buf;
        os_memcpy(k_encr, pos, EAP_SIM_K_ENCR_LEN);
        pos += EAP_SIM_K_ENCR_LEN;
        os_memcpy(k_aut, pos, EAP_SIM_K_AUT_LEN);
        pos += EAP_SIM_K_AUT_LEN;
        os_memcpy(msk, pos, EAP_SIM_KEYING_DATA_LEN);
        pos += EAP_SIM_KEYING_DATA_LEN;
        os_memcpy(emsk, pos, EAP_EMSK_LEN);

        wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: K_encr",
                        k_encr, EAP_SIM_K_ENCR_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: K_aut",
                        k_aut, EAP_SIM_K_AUT_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: keying material (MSK)",
                        msk, EAP_SIM_KEYING_DATA_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: EMSK", emsk, EAP_EMSK_LEN);
        os_memset(buf, 0, sizeof(buf));

        return 0;
}


int eap_sim_derive_keys_reauth(u16 _counter,
                               const u8 *identity, size_t identity_len,
                               const u8 *nonce_s, const u8 *mk, u8 *msk,
                               u8 *emsk)
{
        u8 xkey[SHA1_MAC_LEN];
        u8 buf[EAP_SIM_KEYING_DATA_LEN + EAP_EMSK_LEN + 32];
        u8 counter[2];
        const u8 *addr[4];
        size_t len[4];

        while (identity_len > 0 && identity[identity_len - 1] == 0) {
                wpa_printf(MSG_DEBUG, "EAP-SIM: Workaround - drop null "
                           "character from the end of identity");
                identity_len--;
        }
        addr[0] = identity;
        len[0] = identity_len;
        addr[1] = counter;
        len[1] = 2;
        addr[2] = nonce_s;
        len[2] = EAP_SIM_NONCE_S_LEN;
        addr[3] = mk;
        len[3] = EAP_SIM_MK_LEN;

        WPA_PUT_BE16(counter, _counter);

        wpa_printf(MSG_DEBUG, "EAP-SIM: Deriving keying data from reauth");
        wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM: Identity",
                          identity, identity_len);
        wpa_hexdump(MSG_DEBUG, "EAP-SIM: counter", counter, 2);
        wpa_hexdump(MSG_DEBUG, "EAP-SIM: NONCE_S", nonce_s,
                    EAP_SIM_NONCE_S_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: MK", mk, EAP_SIM_MK_LEN);

        /* XKEY' = SHA1(Identity|counter|NONCE_S|MK) */
        sha1_vector(4, addr, len, xkey);
        wpa_hexdump(MSG_DEBUG, "EAP-SIM: XKEY'", xkey, SHA1_MAC_LEN);

        if (eap_sim_prf(xkey, buf, sizeof(buf)) < 0) {
                wpa_printf(MSG_ERROR, "EAP-SIM: Failed to derive keys");
                return -1;
        }
        if (msk) {
                os_memcpy(msk, buf, EAP_SIM_KEYING_DATA_LEN);
                wpa_hexdump(MSG_DEBUG, "EAP-SIM: keying material (MSK)",
                            msk, EAP_SIM_KEYING_DATA_LEN);
        }
        if (emsk) {
                os_memcpy(emsk, buf + EAP_SIM_KEYING_DATA_LEN, EAP_EMSK_LEN);
                wpa_hexdump(MSG_DEBUG, "EAP-SIM: EMSK", emsk, EAP_EMSK_LEN);
        }
        os_memset(buf, 0, sizeof(buf));

        return 0;
}


int eap_sim_verify_mac(const u8 *k_aut, const struct wpabuf *req,
                       const u8 *mac, const u8 *extra, size_t extra_len)
{
        unsigned char hmac[SHA1_MAC_LEN];
        const u8 *addr[2];
        size_t len[2];
        u8 *tmp;

        if (mac == NULL || wpabuf_len(req) < EAP_SIM_MAC_LEN ||
            mac < wpabuf_head_u8(req) ||
            mac > wpabuf_head_u8(req) + wpabuf_len(req) - EAP_SIM_MAC_LEN)
                return -1;

        tmp = os_malloc(wpabuf_len(req));
        if (tmp == NULL)
                return -1;

        addr[0] = tmp;
        len[0] = wpabuf_len(req);
        addr[1] = extra;
        len[1] = extra_len;

        /* HMAC-SHA1-128 */
        os_memcpy(tmp, wpabuf_head(req), wpabuf_len(req));
        os_memset(tmp + (mac - wpabuf_head_u8(req)), 0, EAP_SIM_MAC_LEN);
        wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Verify MAC - msg",
                    tmp, wpabuf_len(req));
        wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Verify MAC - extra data",
                    extra, extra_len);
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-SIM: Verify MAC - K_aut",
                        k_aut, EAP_SIM_K_AUT_LEN);
        hmac_sha1_vector(k_aut, EAP_SIM_K_AUT_LEN, 2, addr, len, hmac);
        wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Verify MAC: MAC",
                    hmac, EAP_SIM_MAC_LEN);
        os_free(tmp);

        return (os_memcmp(hmac, mac, EAP_SIM_MAC_LEN) == 0) ? 0 : 1;
}


void eap_sim_add_mac(const u8 *k_aut, const u8 *msg, size_t msg_len, u8 *mac,
                     const u8 *extra, size_t extra_len)
{
        unsigned char hmac[SHA1_MAC_LEN];
        const u8 *addr[2];
        size_t len[2];

        addr[0] = msg;
        len[0] = msg_len;
        addr[1] = extra;
        len[1] = extra_len;

        /* HMAC-SHA1-128 */
        os_memset(mac, 0, EAP_SIM_MAC_LEN);
        wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Add MAC - msg", msg, msg_len);
        wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Add MAC - extra data",
                    extra, extra_len);
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-SIM: Add MAC - K_aut",
                        k_aut, EAP_SIM_K_AUT_LEN);
        hmac_sha1_vector(k_aut, EAP_SIM_K_AUT_LEN, 2, addr, len, hmac);
        os_memcpy(mac, hmac, EAP_SIM_MAC_LEN);
        wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Add MAC: MAC",
                    mac, EAP_SIM_MAC_LEN);
}


#ifdef EAP_AKA_PRIME
static void prf_prime(const u8 *k, const char *seed1,
                      const u8 *seed2, size_t seed2_len,
                      const u8 *seed3, size_t seed3_len,
                      u8 *res, size_t res_len)
{
        const u8 *addr[5];
        size_t len[5];
        u8 hash[SHA256_MAC_LEN];
        u8 iter;

        /*
         * PRF'(K,S) = T1 | T2 | T3 | T4 | ...
         * T1 = HMAC-SHA-256 (K, S | 0x01)
         * T2 = HMAC-SHA-256 (K, T1 | S | 0x02)
         * T3 = HMAC-SHA-256 (K, T2 | S | 0x03)
         * T4 = HMAC-SHA-256 (K, T3 | S | 0x04)
         * ...
         */

        addr[0] = hash;
        len[0] = 0;
        addr[1] = (const u8 *) seed1;
        len[1] = os_strlen(seed1);
        addr[2] = seed2;
        len[2] = seed2_len;
        addr[3] = seed3;
        len[3] = seed3_len;
        addr[4] = &iter;
        len[4] = 1;

        iter = 0;
        while (res_len) {
                size_t hlen;
                iter++;
                hmac_sha256_vector(k, 32, 5, addr, len, hash);
                len[0] = SHA256_MAC_LEN;
                hlen = res_len > SHA256_MAC_LEN ? SHA256_MAC_LEN : res_len;
                os_memcpy(res, hash, hlen);
                res += hlen;
                res_len -= hlen;
        }
}


void eap_aka_prime_derive_keys(const u8 *identity, size_t identity_len,
                               const u8 *ik, const u8 *ck, u8 *k_encr,
                               u8 *k_aut, u8 *k_re, u8 *msk, u8 *emsk)
{
        u8 key[EAP_AKA_IK_LEN + EAP_AKA_CK_LEN];
        u8 keys[EAP_SIM_K_ENCR_LEN + EAP_AKA_PRIME_K_AUT_LEN +
                EAP_AKA_PRIME_K_RE_LEN + EAP_MSK_LEN + EAP_EMSK_LEN];
        u8 *pos;

        /*
         * MK = PRF'(IK'|CK',"EAP-AKA'"|Identity)
         * K_encr = MK[0..127]
         * K_aut  = MK[128..383]
         * K_re   = MK[384..639]
         * MSK    = MK[640..1151]
         * EMSK   = MK[1152..1663]
         */

        os_memcpy(key, ik, EAP_AKA_IK_LEN);
        os_memcpy(key + EAP_AKA_IK_LEN, ck, EAP_AKA_CK_LEN);

        prf_prime(key, "EAP-AKA'", identity, identity_len, NULL, 0,
                  keys, sizeof(keys));

        pos = keys;
        os_memcpy(k_encr, pos, EAP_SIM_K_ENCR_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': K_encr",
                        k_encr, EAP_SIM_K_ENCR_LEN);
        pos += EAP_SIM_K_ENCR_LEN;

        os_memcpy(k_aut, pos, EAP_AKA_PRIME_K_AUT_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': K_aut",
                        k_aut, EAP_AKA_PRIME_K_AUT_LEN);
        pos += EAP_AKA_PRIME_K_AUT_LEN;

        os_memcpy(k_re, pos, EAP_AKA_PRIME_K_RE_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': K_re",
                        k_re, EAP_AKA_PRIME_K_RE_LEN);
        pos += EAP_AKA_PRIME_K_RE_LEN;

        os_memcpy(msk, pos, EAP_MSK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': MSK", msk, EAP_MSK_LEN);
        pos += EAP_MSK_LEN;

        os_memcpy(emsk, pos, EAP_EMSK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': EMSK", emsk, EAP_EMSK_LEN);
}


int eap_aka_prime_derive_keys_reauth(const u8 *k_re, u16 counter,
                                     const u8 *identity, size_t identity_len,
                                     const u8 *nonce_s, u8 *msk, u8 *emsk)
{
        u8 seed3[2 + EAP_SIM_NONCE_S_LEN];
        u8 keys[EAP_MSK_LEN + EAP_EMSK_LEN];
        u8 *pos;

        /*
         * MK = PRF'(K_re,"EAP-AKA' re-auth"|Identity|counter|NONCE_S)
         * MSK  = MK[0..511]
         * EMSK = MK[512..1023]
         */

        WPA_PUT_BE16(seed3, counter);
        os_memcpy(seed3 + 2, nonce_s, EAP_SIM_NONCE_S_LEN);

        prf_prime(k_re, "EAP-AKA' re-auth", identity, identity_len,
                  seed3, sizeof(seed3),
                  keys, sizeof(keys));

        pos = keys;
        os_memcpy(msk, pos, EAP_MSK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': MSK", msk, EAP_MSK_LEN);
        pos += EAP_MSK_LEN;

        os_memcpy(emsk, pos, EAP_EMSK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': EMSK", emsk, EAP_EMSK_LEN);

        os_memset(keys, 0, sizeof(keys));

        return 0;
}


int eap_sim_verify_mac_sha256(const u8 *k_aut, const struct wpabuf *req,
                              const u8 *mac, const u8 *extra, size_t extra_len)
{
        unsigned char hmac[SHA256_MAC_LEN];
        const u8 *addr[2];
        size_t len[2];
        u8 *tmp;

        if (mac == NULL || wpabuf_len(req) < EAP_SIM_MAC_LEN ||
            mac < wpabuf_head_u8(req) ||
            mac > wpabuf_head_u8(req) + wpabuf_len(req) - EAP_SIM_MAC_LEN)
                return -1;

        tmp = os_malloc(wpabuf_len(req));
        if (tmp == NULL)
                return -1;

        addr[0] = tmp;
        len[0] = wpabuf_len(req);
        addr[1] = extra;
        len[1] = extra_len;

        /* HMAC-SHA-256-128 */
        os_memcpy(tmp, wpabuf_head(req), wpabuf_len(req));
        os_memset(tmp + (mac - wpabuf_head_u8(req)), 0, EAP_SIM_MAC_LEN);
        wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Verify MAC - msg",
                    tmp, wpabuf_len(req));
        wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Verify MAC - extra data",
                    extra, extra_len);
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-AKA': Verify MAC - K_aut",
                        k_aut, EAP_AKA_PRIME_K_AUT_LEN);
        hmac_sha256_vector(k_aut, EAP_AKA_PRIME_K_AUT_LEN, 2, addr, len, hmac);
        wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Verify MAC: MAC",
                    hmac, EAP_SIM_MAC_LEN);
        os_free(tmp);

        return (os_memcmp(hmac, mac, EAP_SIM_MAC_LEN) == 0) ? 0 : 1;
}


void eap_sim_add_mac_sha256(const u8 *k_aut, const u8 *msg, size_t msg_len,
                            u8 *mac, const u8 *extra, size_t extra_len)
{
        unsigned char hmac[SHA256_MAC_LEN];
        const u8 *addr[2];
        size_t len[2];

        addr[0] = msg;
        len[0] = msg_len;
        addr[1] = extra;
        len[1] = extra_len;

        /* HMAC-SHA-256-128 */
        os_memset(mac, 0, EAP_SIM_MAC_LEN);
        wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Add MAC - msg", msg, msg_len);
        wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Add MAC - extra data",
                    extra, extra_len);
        wpa_hexdump_key(MSG_MSGDUMP, "EAP-AKA': Add MAC - K_aut",
                        k_aut, EAP_AKA_PRIME_K_AUT_LEN);
        hmac_sha256_vector(k_aut, EAP_AKA_PRIME_K_AUT_LEN, 2, addr, len, hmac);
        os_memcpy(mac, hmac, EAP_SIM_MAC_LEN);
        wpa_hexdump(MSG_MSGDUMP, "EAP-AKA': Add MAC: MAC",
                    mac, EAP_SIM_MAC_LEN);
}


void eap_aka_prime_derive_ck_ik_prime(u8 *ck, u8 *ik, const u8 *sqn_ak,
                                      const u8 *network_name,
                                      size_t network_name_len)
{
        u8 key[EAP_AKA_CK_LEN + EAP_AKA_IK_LEN];
        u8 hash[SHA256_MAC_LEN];
        const u8 *addr[5];
        size_t len[5];
        u8 fc;
        u8 l0[2], l1[2];

        /* 3GPP TS 33.402 V8.0.0
         * (CK', IK') = F(CK, IK, <access network identity>)
         */
        /* TODO: CK', IK' generation should really be moved into the actual
         * AKA procedure with network name passed in there and option to use
         * AMF separation bit = 1 (3GPP TS 33.401). */

        /* Change Request 33.402 CR 0033 to version 8.1.1 from
         * 3GPP TSG-SA WG3 Meeting #53 in September 2008:
         *
         * CK' || IK' = HMAC-SHA-256(Key, S)
         * S = FC || P0 || L0 || P1 || L1 || ... || Pn || Ln
         * Key = CK || IK
         * FC = 0x20
         * P0 = access network identity (3GPP TS 24.302)
         * L0 = length of acceess network identity (2 octets, big endian)
         * P1 = SQN xor AK (if AK is not used, AK is treaded as 000..0
         * L1 = 0x00 0x06
         */

        fc = 0x20;

        wpa_printf(MSG_DEBUG, "EAP-AKA': Derive (CK',IK') from (CK,IK)");
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': CK", ck, EAP_AKA_CK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': IK", ik, EAP_AKA_IK_LEN);
        wpa_printf(MSG_DEBUG, "EAP-AKA': FC = 0x%x", fc);
        wpa_hexdump_ascii(MSG_DEBUG, "EAP-AKA': P0 = Access network identity",
                          network_name, network_name_len);
        wpa_hexdump(MSG_DEBUG, "EAP-AKA': P1 = SQN xor AK", sqn_ak, 6);

        os_memcpy(key, ck, EAP_AKA_CK_LEN);
        os_memcpy(key + EAP_AKA_CK_LEN, ik, EAP_AKA_IK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': Key = CK || IK",
                        key, sizeof(key));

        addr[0] = &fc;
        len[0] = 1;
        addr[1] = network_name;
        len[1] = network_name_len;
        WPA_PUT_BE16(l0, network_name_len);
        addr[2] = l0;
        len[2] = 2;
        addr[3] = sqn_ak;
        len[3] = 6;
        WPA_PUT_BE16(l1, 6);
        addr[4] = l1;
        len[4] = 2;

        hmac_sha256_vector(key, sizeof(key), 5, addr, len, hash);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': KDF output (CK' || IK')",
                        hash, sizeof(hash));

        os_memcpy(ck, hash, EAP_AKA_CK_LEN);
        os_memcpy(ik, hash + EAP_AKA_CK_LEN, EAP_AKA_IK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': CK'", ck, EAP_AKA_CK_LEN);
        wpa_hexdump_key(MSG_DEBUG, "EAP-AKA': IK'", ik, EAP_AKA_IK_LEN);
}
#endif /* EAP_AKA_PRIME */


int eap_sim_parse_attr(const u8 *start, const u8 *end,
                       struct eap_sim_attrs *attr, int aka, int encr)
{
        const u8 *pos = start, *apos;
        size_t alen, plen, i, list_len;

        os_memset(attr, 0, sizeof(*attr));
        attr->id_req = NO_ID_REQ;
        attr->notification = -1;
        attr->counter = -1;
        attr->selected_version = -1;
        attr->client_error_code = -1;

        while (pos < end) {
                if (pos + 2 > end) {
                        wpa_printf(MSG_INFO, "EAP-SIM: Attribute overflow(1)");
                        return -1;
                }
                wpa_printf(MSG_MSGDUMP, "EAP-SIM: Attribute: Type=%d Len=%d",
                           pos[0], pos[1] * 4);
                if (pos + pos[1] * 4 > end) {
                        wpa_printf(MSG_INFO, "EAP-SIM: Attribute overflow "
                                   "(pos=%p len=%d end=%p)",
                                   pos, pos[1] * 4, end);
                        return -1;
                }
                if (pos[1] == 0) {
                        wpa_printf(MSG_INFO, "EAP-SIM: Attribute underflow");
                        return -1;
                }
                apos = pos + 2;
                alen = pos[1] * 4 - 2;
                wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Attribute data",
                            apos, alen);

                switch (pos[0]) {
                case EAP_SIM_AT_RAND:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_RAND");
                        apos += 2;
                        alen -= 2;
                        if ((!aka && (alen % GSM_RAND_LEN)) ||
                            (aka && alen != EAP_AKA_RAND_LEN)) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_RAND"
                                           " (len %lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->rand = apos;
                        attr->num_chal = alen / GSM_RAND_LEN;
                        break;
                case EAP_SIM_AT_AUTN:
                        wpa_printf(MSG_DEBUG, "EAP-AKA: AT_AUTN");
                        if (!aka) {
                                wpa_printf(MSG_DEBUG, "EAP-SIM: "
                                           "Unexpected AT_AUTN");
                                return -1;
                        }
                        apos += 2;
                        alen -= 2;
                        if (alen != EAP_AKA_AUTN_LEN) {
                                wpa_printf(MSG_INFO, "EAP-AKA: Invalid AT_AUTN"
                                           " (len %lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->autn = apos;
                        break;
                case EAP_SIM_AT_PADDING:
                        if (!encr) {
                                wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted "
                                           "AT_PADDING");
                                return -1;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) AT_PADDING");
                        for (i = 2; i < alen; i++) {
                                if (apos[i] != 0) {
                                        wpa_printf(MSG_INFO, "EAP-SIM: (encr) "
                                                   "AT_PADDING used a non-zero"
                                                   " padding byte");
                                        wpa_hexdump(MSG_DEBUG, "EAP-SIM: "
                                                    "(encr) padding bytes",
                                                    apos + 2, alen - 2);
                                        return -1;
                                }
                        }
                        break;
                case EAP_SIM_AT_NONCE_MT:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_NONCE_MT");
                        if (alen != 2 + EAP_SIM_NONCE_MT_LEN) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid "
                                           "AT_NONCE_MT length");
                                return -1;
                        }
                        attr->nonce_mt = apos + 2;
                        break;
                case EAP_SIM_AT_PERMANENT_ID_REQ:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_PERMANENT_ID_REQ");
                        attr->id_req = PERMANENT_ID;
                        break;
                case EAP_SIM_AT_MAC:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_MAC");
                        if (alen != 2 + EAP_SIM_MAC_LEN) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_MAC "
                                           "length");
                                return -1;
                        }
                        attr->mac = apos + 2;
                        break;
                case EAP_SIM_AT_NOTIFICATION:
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid "
                                           "AT_NOTIFICATION length %lu",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->notification = apos[0] * 256 + apos[1];
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_NOTIFICATION %d",
                                   attr->notification);
                        break;
                case EAP_SIM_AT_ANY_ID_REQ:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_ANY_ID_REQ");
                        attr->id_req = ANY_ID;
                        break;
                case EAP_SIM_AT_IDENTITY:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_IDENTITY");
                        plen = WPA_GET_BE16(apos);
                        apos += 2;
                        alen -= 2;
                        if (plen > alen) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid "
                                           "AT_IDENTITY (Actual Length %lu, "
                                           "remaining length %lu)",
                                           (unsigned long) plen,
                                           (unsigned long) alen);
                                return -1;
                        }

                        attr->identity = apos;
                        attr->identity_len = plen;
                        break;
                case EAP_SIM_AT_VERSION_LIST:
                        if (aka) {
                                wpa_printf(MSG_DEBUG, "EAP-AKA: "
                                           "Unexpected AT_VERSION_LIST");
                                return -1;
                        }
                        list_len = apos[0] * 256 + apos[1];
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_VERSION_LIST");
                        if (list_len < 2 || list_len > alen - 2) {
                                wpa_printf(MSG_WARNING, "EAP-SIM: Invalid "
                                           "AT_VERSION_LIST (list_len=%lu "
                                           "attr_len=%lu)",
                                           (unsigned long) list_len,
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->version_list = apos + 2;
                        attr->version_list_len = list_len;
                        break;
                case EAP_SIM_AT_SELECTED_VERSION:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_SELECTED_VERSION");
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid "
                                           "AT_SELECTED_VERSION length %lu",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->selected_version = apos[0] * 256 + apos[1];
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_SELECTED_VERSION "
                                   "%d", attr->selected_version);
                        break;
                case EAP_SIM_AT_FULLAUTH_ID_REQ:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_FULLAUTH_ID_REQ");
                        attr->id_req = FULLAUTH_ID;
                        break;
                case EAP_SIM_AT_COUNTER:
                        if (!encr) {
                                wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted "
                                           "AT_COUNTER");
                                return -1;
                        }
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid "
                                           "AT_COUNTER (alen=%lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->counter = apos[0] * 256 + apos[1];
                        wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) AT_COUNTER %d",
                                   attr->counter);
                        break;
                case EAP_SIM_AT_COUNTER_TOO_SMALL:
                        if (!encr) {
                                wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted "
                                           "AT_COUNTER_TOO_SMALL");
                                return -1;
                        }
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid "
                                           "AT_COUNTER_TOO_SMALL (alen=%lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) "
                                   "AT_COUNTER_TOO_SMALL");
                        attr->counter_too_small = 1;
                        break;
                case EAP_SIM_AT_NONCE_S:
                        if (!encr) {
                                wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted "
                                           "AT_NONCE_S");
                                return -1;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) "
                                   "AT_NONCE_S");
                        if (alen != 2 + EAP_SIM_NONCE_S_LEN) {
                                wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid "
                                           "AT_NONCE_S (alen=%lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->nonce_s = apos + 2;
                        break;
                case EAP_SIM_AT_CLIENT_ERROR_CODE:
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid "
                                           "AT_CLIENT_ERROR_CODE length %lu",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->client_error_code = apos[0] * 256 + apos[1];
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_CLIENT_ERROR_CODE "
                                   "%d", attr->client_error_code);
                        break;
                case EAP_SIM_AT_IV:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_IV");
                        if (alen != 2 + EAP_SIM_MAC_LEN) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_IV "
                                           "length %lu", (unsigned long) alen);
                                return -1;
                        }
                        attr->iv = apos + 2;
                        break;
                case EAP_SIM_AT_ENCR_DATA:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_ENCR_DATA");
                        attr->encr_data = apos + 2;
                        attr->encr_data_len = alen - 2;
                        if (attr->encr_data_len % 16) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid "
                                           "AT_ENCR_DATA length %lu",
                                           (unsigned long)
                                           attr->encr_data_len);
                                return -1;
                        }
                        break;
                case EAP_SIM_AT_NEXT_PSEUDONYM:
                        if (!encr) {
                                wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted "
                                           "AT_NEXT_PSEUDONYM");
                                return -1;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) "
                                   "AT_NEXT_PSEUDONYM");
                        plen = apos[0] * 256 + apos[1];
                        if (plen > alen - 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid"
                                           " AT_NEXT_PSEUDONYM (actual"
                                           " len %lu, attr len %lu)",
                                           (unsigned long) plen,
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->next_pseudonym = pos + 4;
                        attr->next_pseudonym_len = plen;
                        break;
                case EAP_SIM_AT_NEXT_REAUTH_ID:
                        if (!encr) {
                                wpa_printf(MSG_ERROR, "EAP-SIM: Unencrypted "
                                           "AT_NEXT_REAUTH_ID");
                                return -1;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-SIM: (encr) "
                                   "AT_NEXT_REAUTH_ID");
                        plen = apos[0] * 256 + apos[1];
                        if (plen > alen - 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid"
                                           " AT_NEXT_REAUTH_ID (actual"
                                           " len %lu, attr len %lu)",
                                           (unsigned long) plen,
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->next_reauth_id = pos + 4;
                        attr->next_reauth_id_len = plen;
                        break;
                case EAP_SIM_AT_RES:
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_RES");
                        attr->res_len_bits = WPA_GET_BE16(apos);
                        apos += 2;
                        alen -= 2;
                        if (!aka || alen < EAP_AKA_MIN_RES_LEN ||
                            alen > EAP_AKA_MAX_RES_LEN) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid AT_RES "
                                           "(len %lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->res = apos;
                        attr->res_len = alen;
                        break;
                case EAP_SIM_AT_AUTS:
                        wpa_printf(MSG_DEBUG, "EAP-AKA: AT_AUTS");
                        if (!aka) {
                                wpa_printf(MSG_DEBUG, "EAP-SIM: "
                                           "Unexpected AT_AUTS");
                                return -1;
                        }
                        if (alen != EAP_AKA_AUTS_LEN) {
                                wpa_printf(MSG_INFO, "EAP-AKA: Invalid AT_AUTS"
                                           " (len %lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->auts = apos;
                        break;
                case EAP_SIM_AT_CHECKCODE:
                        wpa_printf(MSG_DEBUG, "EAP-AKA: AT_CHECKCODE");
                        if (!aka) {
                                wpa_printf(MSG_DEBUG, "EAP-SIM: "
                                           "Unexpected AT_CHECKCODE");
                                return -1;
                        }
                        apos += 2;
                        alen -= 2;
                        if (alen != 0 && alen != EAP_AKA_CHECKCODE_LEN &&
                            alen != EAP_AKA_PRIME_CHECKCODE_LEN) {
                                wpa_printf(MSG_INFO, "EAP-AKA: Invalid "
                                           "AT_CHECKCODE (len %lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->checkcode = apos;
                        attr->checkcode_len = alen;
                        break;
                case EAP_SIM_AT_RESULT_IND:
                        if (encr) {
                                wpa_printf(MSG_ERROR, "EAP-SIM: Encrypted "
                                           "AT_RESULT_IND");
                                return -1;
                        }
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Invalid "
                                           "AT_RESULT_IND (alen=%lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        wpa_printf(MSG_DEBUG, "EAP-SIM: AT_RESULT_IND");
                        attr->result_ind = 1;
                        break;
#ifdef EAP_AKA_PRIME
                case EAP_SIM_AT_KDF_INPUT:
                        if (aka != 2) {
                                wpa_printf(MSG_INFO, "EAP-AKA: Unexpected "
                                           "AT_KDF_INPUT");
                                return -1;
                        }

                        wpa_printf(MSG_DEBUG, "EAP-AKA: AT_KDF_INPUT");
                        plen = WPA_GET_BE16(apos);
                        apos += 2;
                        alen -= 2;
                        if (plen > alen) {
                                wpa_printf(MSG_INFO, "EAP-AKA': Invalid "
                                           "AT_KDF_INPUT (Actual Length %lu, "
                                           "remaining length %lu)",
                                           (unsigned long) plen,
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->kdf_input = apos;
                        attr->kdf_input_len = plen;
                        break;
                case EAP_SIM_AT_KDF:
                        if (aka != 2) {
                                wpa_printf(MSG_INFO, "EAP-AKA: Unexpected "
                                           "AT_KDF");
                                return -1;
                        }

                        wpa_printf(MSG_DEBUG, "EAP-AKA: AT_KDF");
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-AKA': Invalid "
                                           "AT_KDF (len %lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        if (attr->kdf_count == EAP_AKA_PRIME_KDF_MAX) {
                                wpa_printf(MSG_DEBUG, "EAP-AKA': Too many "
                                           "AT_KDF attributes - ignore this");
                                continue;
                        }
                        attr->kdf[attr->kdf_count] = WPA_GET_BE16(apos);
                        attr->kdf_count++;
                        break;
                case EAP_SIM_AT_BIDDING:
                        wpa_printf(MSG_DEBUG, "EAP-AKA: AT_BIDDING");
                        if (alen != 2) {
                                wpa_printf(MSG_INFO, "EAP-AKA: Invalid "
                                           "AT_BIDDING (len %lu)",
                                           (unsigned long) alen);
                                return -1;
                        }
                        attr->bidding = apos;
                        break;
#endif /* EAP_AKA_PRIME */
                default:
                        if (pos[0] < 128) {
                                wpa_printf(MSG_INFO, "EAP-SIM: Unrecognized "
                                           "non-skippable attribute %d",
                                           pos[0]);
                                return -1;
                        }

                        wpa_printf(MSG_DEBUG, "EAP-SIM: Unrecognized skippable"
                                   " attribute %d ignored", pos[0]);
                        break;
                }

                pos += pos[1] * 4;
        }

        wpa_printf(MSG_DEBUG, "EAP-SIM: Attributes parsed successfully "
                   "(aka=%d encr=%d)", aka, encr);

        return 0;
}


u8 * eap_sim_parse_encr(const u8 *k_encr, const u8 *encr_data,
                        size_t encr_data_len, const u8 *iv,
                        struct eap_sim_attrs *attr, int aka)
{
        u8 *decrypted;

        if (!iv) {
                wpa_printf(MSG_INFO, "EAP-SIM: Encrypted data, but no IV");
                return NULL;
        }

        decrypted = os_malloc(encr_data_len);
        if (decrypted == NULL)
                return NULL;
        os_memcpy(decrypted, encr_data, encr_data_len);

        if (aes_128_cbc_decrypt(k_encr, iv, decrypted, encr_data_len)) {
                os_free(decrypted);
                return NULL;
        }
        wpa_hexdump(MSG_MSGDUMP, "EAP-SIM: Decrypted AT_ENCR_DATA",
                    decrypted, encr_data_len);

        if (eap_sim_parse_attr(decrypted, decrypted + encr_data_len, attr,
                               aka, 1)) {
                wpa_printf(MSG_INFO, "EAP-SIM: (encr) Failed to parse "
                           "decrypted AT_ENCR_DATA");
                os_free(decrypted);
                return NULL;
        }

        return decrypted;
}


#define EAP_SIM_INIT_LEN 128

struct eap_sim_msg {
        struct wpabuf *buf;
        size_t mac, iv, encr; /* index from buf */
        int type;
};


struct eap_sim_msg * eap_sim_msg_init(int code, int id, int type, int subtype)
{
        struct eap_sim_msg *msg;
        struct eap_hdr *eap;
        u8 *pos;

        msg = os_zalloc(sizeof(*msg));
        if (msg == NULL)
                return NULL;

        msg->type = type;
        msg->buf = wpabuf_alloc(EAP_SIM_INIT_LEN);
        if (msg->buf == NULL) {
                os_free(msg);
                return NULL;
        }
        eap = wpabuf_put(msg->buf, sizeof(*eap));
        eap->code = code;
        eap->identifier = id;

        pos = wpabuf_put(msg->buf, 4);
        *pos++ = type;
        *pos++ = subtype;
        *pos++ = 0; /* Reserved */
        *pos++ = 0; /* Reserved */

        return msg;
}


struct wpabuf * eap_sim_msg_finish(struct eap_sim_msg *msg, const u8 *k_aut,
                                   const u8 *extra, size_t extra_len)
{
        struct eap_hdr *eap;
        struct wpabuf *buf;

        if (msg == NULL)
                return NULL;

        eap = wpabuf_mhead(msg->buf);
        eap->length = host_to_be16(wpabuf_len(msg->buf));

#ifdef EAP_AKA_PRIME
        if (k_aut && msg->mac && msg->type == EAP_TYPE_AKA_PRIME) {
                eap_sim_add_mac_sha256(k_aut, (u8 *) wpabuf_head(msg->buf),
                                       wpabuf_len(msg->buf),
                                       (u8 *) wpabuf_mhead(msg->buf) +
                                       msg->mac, extra, extra_len);
        } else
#endif /* EAP_AKA_PRIME */
        if (k_aut && msg->mac) {
                eap_sim_add_mac(k_aut, (u8 *) wpabuf_head(msg->buf),
                                wpabuf_len(msg->buf),
                                (u8 *) wpabuf_mhead(msg->buf) + msg->mac,
                                extra, extra_len);
        }

        buf = msg->buf;
        os_free(msg);
        return buf;
}


void eap_sim_msg_free(struct eap_sim_msg *msg)
{
        if (msg) {
                wpabuf_free(msg->buf);
                os_free(msg);
        }
}


u8 * eap_sim_msg_add_full(struct eap_sim_msg *msg, u8 attr,
                          const u8 *data, size_t len)
{
        int attr_len = 2 + len;
        int pad_len;
        u8 *start;

        if (msg == NULL)
                return NULL;

        pad_len = (4 - attr_len % 4) % 4;
        attr_len += pad_len;
        if (wpabuf_resize(&msg->buf, attr_len))
                return NULL;
        start = wpabuf_put(msg->buf, 0);
        wpabuf_put_u8(msg->buf, attr);
        wpabuf_put_u8(msg->buf, attr_len / 4);
        wpabuf_put_data(msg->buf, data, len);
        if (pad_len)
                os_memset(wpabuf_put(msg->buf, pad_len), 0, pad_len);
        return start;
}


u8 * eap_sim_msg_add(struct eap_sim_msg *msg, u8 attr, u16 value,
                     const u8 *data, size_t len)
{
        int attr_len = 4 + len;
        int pad_len;
        u8 *start;

        if (msg == NULL)
                return NULL;

        pad_len = (4 - attr_len % 4) % 4;
        attr_len += pad_len;
        if (wpabuf_resize(&msg->buf, attr_len))
                return NULL;
        start = wpabuf_put(msg->buf, 0);
        wpabuf_put_u8(msg->buf, attr);
        wpabuf_put_u8(msg->buf, attr_len / 4);
        wpabuf_put_be16(msg->buf, value);
        if (data)
                wpabuf_put_data(msg->buf, data, len);
        else
                wpabuf_put(msg->buf, len);
        if (pad_len)
                os_memset(wpabuf_put(msg->buf, pad_len), 0, pad_len);
        return start;
}


u8 * eap_sim_msg_add_mac(struct eap_sim_msg *msg, u8 attr)
{
        u8 *pos = eap_sim_msg_add(msg, attr, 0, NULL, EAP_SIM_MAC_LEN);
        if (pos)
                msg->mac = (pos - wpabuf_head_u8(msg->buf)) + 4;
        return pos;
}


int eap_sim_msg_add_encr_start(struct eap_sim_msg *msg, u8 attr_iv,
                               u8 attr_encr)
{
        u8 *pos = eap_sim_msg_add(msg, attr_iv, 0, NULL, EAP_SIM_IV_LEN);
        if (pos == NULL)
                return -1;
        msg->iv = (pos - wpabuf_head_u8(msg->buf)) + 4;
        if (os_get_random(wpabuf_mhead_u8(msg->buf) + msg->iv,
                          EAP_SIM_IV_LEN)) {
                msg->iv = 0;
                return -1;
        }

        pos = eap_sim_msg_add(msg, attr_encr, 0, NULL, 0);
        if (pos == NULL) {
                msg->iv = 0;
                return -1;
        }
        msg->encr = pos - wpabuf_head_u8(msg->buf);

        return 0;
}


int eap_sim_msg_add_encr_end(struct eap_sim_msg *msg, u8 *k_encr, int attr_pad)
{
        size_t encr_len;

        if (msg == NULL || k_encr == NULL || msg->iv == 0 || msg->encr == 0)
                return -1;

        encr_len = wpabuf_len(msg->buf) - msg->encr - 4;
        if (encr_len % 16) {
                u8 *pos;
                int pad_len = 16 - (encr_len % 16);
                if (pad_len < 4) {
                        wpa_printf(MSG_WARNING, "EAP-SIM: "
                                   "eap_sim_msg_add_encr_end - invalid pad_len"
                                   " %d", pad_len);
                        return -1;
                }
                wpa_printf(MSG_DEBUG, "   *AT_PADDING");
                pos = eap_sim_msg_add(msg, attr_pad, 0, NULL, pad_len - 4);
                if (pos == NULL)
                        return -1;
                os_memset(pos + 4, 0, pad_len - 4);
                encr_len += pad_len;
        }
        wpa_printf(MSG_DEBUG, "   (AT_ENCR_DATA data len %lu)",
                   (unsigned long) encr_len);
        wpabuf_mhead_u8(msg->buf)[msg->encr + 1] = encr_len / 4 + 1;
        return aes_128_cbc_encrypt(k_encr, wpabuf_head_u8(msg->buf) + msg->iv,
                                   wpabuf_mhead_u8(msg->buf) + msg->encr + 4,
                                   encr_len);
}


void eap_sim_report_notification(void *msg_ctx, int notification, int aka)
{
#ifndef CONFIG_NO_STDOUT_DEBUG
        const char *type = aka ? "AKA" : "SIM";
#endif /* CONFIG_NO_STDOUT_DEBUG */

        switch (notification) {
        case EAP_SIM_GENERAL_FAILURE_AFTER_AUTH:
                wpa_printf(MSG_WARNING, "EAP-%s: General failure "
                           "notification (after authentication)", type);
                break;
        case EAP_SIM_TEMPORARILY_DENIED:
                wpa_printf(MSG_WARNING, "EAP-%s: Failure notification: "
                           "User has been temporarily denied access to the "
                           "requested service", type);
                break;
        case EAP_SIM_NOT_SUBSCRIBED:
                wpa_printf(MSG_WARNING, "EAP-%s: Failure notification: "
                           "User has not subscribed to the requested service",
                           type);
                break;
        case EAP_SIM_GENERAL_FAILURE_BEFORE_AUTH:
                wpa_printf(MSG_WARNING, "EAP-%s: General failure "
                           "notification (before authentication)", type);
                break;
        case EAP_SIM_SUCCESS:
                wpa_printf(MSG_INFO, "EAP-%s: Successful authentication "
                           "notification", type);
                break;
        default:
                if (notification >= 32768) {
                        wpa_printf(MSG_INFO, "EAP-%s: Unrecognized "
                                   "non-failure notification %d",
                                   type, notification);
                } else {
                        wpa_printf(MSG_WARNING, "EAP-%s: Unrecognized "
                                   "failure notification %d",
                                   type, notification);
                }
        }
}
